JP4774223B2 - Strainer system - Google Patents

Description

    The present invention is a strainer system for removing impurities present in a liquid or gas, for example, removal of impurities in liquids such as water and sewage, hot springs, industrial water, civil engineering wastewater, chemical reaction liquids, liquid foods, etc. Strainer used to remove dust, dust collection, indoor dust, cedar pollen, bacteria, etc. in factories that handle chemical fertilizer, chemicals, starch, resin powder, ore, explosives, compound feed, cement, catalyst, and other fine powders About the system.

Conventionally, metal coil spring type liquid filtration filter elements are known. In the patent shown in the following Patent Document 1, the applicant of the present application is an element wound in a coil shape having a protrusion on an arcuate outer surface, and the protrusion is interposed between the adjacent ring and the adjacent ring. An invention relating to a liquid filtration filter element in which a gap is formed between each other and a filter aid adheres and crosslinks in the gap is disclosed. Further, in the patent application shown in Patent Document 2, a large number of synthetic resin ring-shaped pieces are superposed on each other to form a cylindrical body, and a slight gap is formed between the adjacent ring-shaped pieces, and filtration is performed in the gap. An invention relating to a liquid filtration filter configured to hold an auxiliary agent has been disclosed.
Japanese Patent No. 3124901 Japanese Patent Application No. 2003-393692

  The present invention is a strainer system for the purpose of further effective utilization of the filter, and further improves the filter so that automatic operation is possible and efficiency is improved. The main purpose is to provide a strainer system.

That is, in order to solve the above-described problems, the present invention provides a cylindrical body wound in a coil shape or a cylindrical body in which a large number of ring-shaped pieces are overlapped, and between adjacent rings of coils or ring-shaped pieces. In a container having an inlet, an outlet, and a partition plate for partitioning between the inlet and the outlet, one or more strainer elements in which a gap is formed and a filter aid adheres and crosslinks in the gap are provided. In the strainer in which one end of the strainer element is fixed to the partition plate and stored, a plurality of inlets project in a trumpet shape on a side surface below the partition plate of the container, and the trumpet-shaped projecting portion is a check valve on the container. A pressure sensor for measuring the outlet side pressure of the container, a pressure switch, and an electromagnetic valve that opens and closes in conjunction with the pressure switch, and the outlet side pressure is set pressure. When it reaches A strainer system characterized by automatically performing backwashing by blowing opening and closing the electromagnetic valve backwash air or backwash liquid by the pressure switch (claim 1).

In order to solve the above-mentioned problem, the present invention provides a cylindrical body wound in a coil shape or a cylindrical body in which a large number of ring-shaped pieces are overlapped, and between adjacent rings of coils or ring-shaped pieces. One or more strainer elements in which a gap is formed and a filter aid adheres to the gap, a partition plate for fixing one end of the strainer element in a suspended state, and the entire upper portion of the partition plate are covered. In addition, in a strainer including a cover having a suction discharge port and an adsorbate receiver disposed below the strainer element, a pressure sensor provided on the discharge port side, a pressure switch, and a vibrator that vibrates the strainer element or be provided with means for removing adsorbates consisting of a hammer tapping strainer element, the outlet-side pressure has reached the set pressure and Stop the suction in the outlet in the strainer system characterized by falling removing adsorbates (Claim 2).

Since the strainer system according to the present invention is configured as described above, the strainer has a semi-permanent life, is compact, saves space, is energy-saving, is maintenance-free, and is industrially discarded like a conventional filter. It doesn't become a thing. In addition, E. coli and general bacteria can be completely removed by high-density filtration, and the running cost can be greatly reduced, and all the deposits on the strainer element can be returned. In addition to the original effects of the strainer system of the present invention, the following effects are also provided. That is, the most efficient and economical operation of the strainer can be ensured by automatically performing the backwashing. By blowing air or backwashing liquid at the time of backwashing, the deposit discharge of the strainer element can be removed in a very short time, so that the operation efficiency is improved. Since the adsorbate that has formed a mass by forming a bridge is removed by powdering with foam containing air, it is easy to reuse the adhering material as a regression raw material without discarding it, and it is extremely economical with no waste. .

  In addition, the gas strainer system is a modification of the gas strainer system that has been used mainly for liquids in the past, and uses a filter aid removal device made of dust or the like instead of backwashing the liquid strainer system. This has ensured efficient and economical operation of the strainer. According to the gas strainer system of the present invention, it has the effect of removing indoor dust, cedar pollen, general bacteria, etc., and therefore has the effect of reducing symptoms of cedar pollinosis and allergies, chemical fertilizer, chemicals, starch, resin It can be used as a dust removal and dust collection device for factories that handle powder, ore, explosives, mixed feed, cement, catalysts, and other fine powders, and contributes to environmental improvement in the factory.

  The best mode for carrying out the present invention (hereinafter abbreviated as an embodiment) will be described below with reference to the drawings. FIG. 1 is an explanatory view illustrating the strainer system S1 according to the first embodiment, and FIG. 2 is a circuit diagram thereof. FIG. 3 is an explanatory view illustrating a strainer system S2 according to the present invention relating to the second embodiment, and FIG. 4 is a circuit diagram thereof. FIG. 5 is an explanatory view illustrating a strainer system S3 according to the present invention related to the third embodiment, and FIG. 6 is an explanatory view illustrating a strainer element.

1 and 2, the strainer system S1 according to the first embodiment by pressure switch control according to this embodiment includes a raw water introduction port 3, a treated water discharge port 4, a backwash discharge port 5, and an air blowing port 6. A strainer 1 stored in a container 7 having one end of a plurality of strainer elements 2 fixed to the partition plate B, a pressure sensor 8 provided on the raw water inlet side of the container 7, and treated water. An electromagnetic valve 11 attached to the discharge port 4, the backwashing discharge port 5 and the air blowing port 6 and opened and closed in conjunction with the pressure switch 9 is provided.

  The strainer element 2 will be briefly described. As shown in FIG. 6, the wire rods having small protrusions 21 are wound so that they are in close contact with each other, and both ends of the coil 22 are provided with fixtures 23, and a metal core 24 slightly longer than the entire length of the coil is inserted in the center. Is fixed by the nuts 25 and 25, so that a minute gap G is formed between the adjacent rings by the small protrusion 21. Therefore, this is used as a filtrate passage, and a filter aid is attached to the periphery of the strainer element 2 for filtering. Liquid or gas to be passed. The filtrate or gas passes through the layer of filter aid from the outside of the strainer element 2, enters the inside of the element 2 from the gap G of the element 2, passes between the element 2 and the metal core 24, and passes through the element 23. It flows out from the opening to the treated water discharge port side at the upper part of the partition plate B in the container 7. Since the inside of the container 7 is partitioned by the partition plate B, the raw water and the treated water are completely separated. Further, the strainer element 2 composed of a cylindrical body in which a large number of ring-shaped pieces are superimposed is a cylindrical body in which a large number of ring-shaped pieces are superimposed in place of the coil, and the other configuration is a coil. It is almost the same as the thing.

  Next, operations of raw water filtration and backwashing in the strainer system S1 will be described. While the strainer system S1 is filtering the raw water, the pressure detected by the pressure sensor 8 is lower than the set pressure of the pressure switch 9, and the electromagnetic valves 11 of the backwash outlet 5 and the air inlet 6 11 is closed and the electromagnetic valve 11 of the treated water discharge port 4 is open. Since the check valve 12 is attached to the raw water inlet 3 and the check valve 12 is opened only when the raw water flows in, the raw water does not flow back from the inside of the container 7 to the water storage tank T. When the strainer element 2 becomes clogged as the filtration process proceeds and the pressure sensor 8 detects that the pressure on the raw water inlet side reaches the set pressure of the pressure switch 9, the treated water discharge port is generated by the electrical signal of the pressure switch 9. The solenoid valve 4a is closed, the solenoids of the solenoid valves 11 and 11 of the backwash outlet 5 and the air inlet 6 are moved to open the valves and backwashing is started.

That is, the high-pressure air blown from the air blowing port 6 is guided from above the strainer element 2 to the inside of the strainer element 2 to slightly expand the strainer element 2 from the inside, so that the cylindrical body of the strainer element 2 is configured. The gap between adjacent rings of the coil or ring-shaped piece is increased by about 2 to 10 microns, and the filter aid adhering to the gap is removed in powder form by the air force. The backwash wastewater mixed with air is discharged from the backwash outlet 5 to the outside of the container 7. After backwashing for a certain period of time, each solenoid valve 11 is returned to its original state by a time switch, the backwashing is finished, and the filtration process is started again. In this way, the pressure sensor 8 senses the pressure on the raw water inlet side, and each solenoid valve 11 is opened and closed by the pressure switch 9 so that backwashing is automatically performed, so that continuous operation is possible.

  Instead of performing the backwashing timing in conjunction with the pressure sensor 8, the backwashing timing may be set in conjunction with a timer for measuring the processing time of the strainer 1. That is, when the timing at which the strainer element 2 is clogged can be assumed in advance depending on the type of raw water to be processed, a timer is set when clogging occurs or the processing capacity is reduced, and backwashing is performed by a time switch. May be configured to start. Instead of the pressure switch and the time switch, a programmable controller (PLC) having these functions may be used.

Next, the strainer system S2 according to the second embodiment shown in FIGS. 3 and 4 will be described. The strainer system S2 according to the second embodiment includes the invention described in claim 1 , and is suitable for processing a gas. In the strainer system S1, the air inlet is replaced with the raw water inlet 3. 13, except that the pressure sensor 8 is provided on the discharge port side instead of the pressure sensor 8 provided on the introduction port side, and the suction / discharge port 14 for treated air is provided instead of the treated water discharge port 4. It is the same. As shown in FIG. 3, a plurality of air inlets 13 are provided on the side surface below the partition plate B of the container 7 so as to project in a trumpet shape, and the trumpet-shaped projecting portion is provided in the container 7 via a check valve 12. During the filtration process, external air is sucked into the container to prevent the air in the container from flowing backward to the outside of the container during backwashing.

  A series of operations of the strainer system S2 will be described. In the strainer system S <b> 2, the filtered air is sucked from the upper part of the container 7 and discharged to the outside from the processing air suction / discharge port 14. Accordingly, the pressure sensor 8 provided on the discharge port side detects a negative pressure, and during the air filtration process, the pressure is higher than the set pressure of the pressure switch 9, so that the process air discharge port 14 opens, The filtered air is discharged to the outside. However, when the filtration process proceeds and the strainer element 2 becomes clogged, the pressure sensed by the pressure sensor 8 gradually becomes low, and when the pressure switch 9 reaches the set pressure, suction is performed by an electrical signal from the pressure switch 9. The solenoid valve 11 of the discharge port 14 is closed and the solenoids of the electromagnetic valves 11 and 11 of the backwash discharge port 5 and the air blowing port 6 are moved to open the valve and backwashing is started. Since backwashing is performed by a high-pressure air flow, backwashing is performed in a short time. Since the subsequent operation conforms to the strainer system S1, description thereof is omitted.

Next, the strainer system S3 according to the third embodiment shown in FIG. 5 will be described. The strainer system S3 according to the third embodiment includes the invention described in claim 2 , and is suitable for processing a gas or a liquid in a wide range of places, in which one end of the strainer element 2 is suspended. A partition plate B that is fixed at the top, a cover C that covers the entire upper portion of the partition plate B and includes a suction / discharge port 14, an adsorbent receiver R disposed below the strainer element 2, a pressure sensor 8 and a pressure The strainer 1 including the switch 9 is characterized in that when the discharge side pressure reaches a set pressure or at every set time, suction at the discharge port is stopped and the adsorbate is dropped and removed.

  In this system, air is not blown as in the strainer system S2, and the adsorbed material falls by its own weight. At this time, dust remains in the coil and the ring-shaped piece of the strainer element 2, and the backwash is finished and filtered. When the process is resumed, the dust residue assists the bridge formation, so that the bridge formation time is significantly shortened. The bridge formation referred to here is a fine mesh or micropore formed by adsorbing and laminating dust in the air or suspended matter (SS) in the filtrate in the vicinity of the gap of the coil or ring piece of the strainer element 2. Forming a product, which acts as a filter aid. Further, in the gas strainer systems S2 and S3, there are some dusts in the air that easily aggregate and harden each other, and it is preferable to include a removing means for removing adsorbed substances such as filter aids. As the removing means, for example, it is preferable that the strainer element 2 is vibrated with a vibrator by attaching a vibrator to the strainer element 2. The dust and the like collected as described above can be returned to the raw material, or can be used effectively again as a filter aid alone or together with other filter aids. In the strainer systems S2 to S3, in order to prevent sterilization and dew condensation, it is preferable that the strainer element 2 is heated or dielectrically heated as necessary, or hot air heated to 60 ° C. or higher is blown.

  As the material used as the filter aid, diatomaceous earth and additives such as pulp, activated carbon, granite, ceramic, various resins, glass, metal, metal oxides and other liquids that filter fine particles and powders It is used according to the purpose of gas or filtration. In addition, as described above, the adsorbate adhering to the strainer element 2 due to contaminants in the liquid or gas to be filtered can also be used together with the filter aid or alone as a filter aid. These filter aids can also serve as a deodorizing action, a decolorizing action, an adsorbing action of ionized heavy metals and other mixed substances, and the like. Moreover, although all the above described automatic driving | operation operation | movement, manual operation can also be easily performed in a small scale installation or an inexpensive installation.

  The strainer system which concerns on the said embodiment was used in the hot spring of Tochigi Prefecture, and it compared with the untreated comparative example. A water quality test report is shown in FIG. According to this water quality test report, the untreated comparative example was 7000 bacteria / ml of general bacteria and positive for the coliform group, whereas in the case of the example treated with this system, the general bacteria Is 0 / ml, and it has been confirmed that the coliform group is not detected.

  By configuring as described above, the strainer system of the present invention has a semi-permanent life, is compact, saves space, is suitable for energy saving, is maintenance-free, and does not become industrial waste like a conventional filter. . E. coli and general bacteria can be removed by high-precision filtration, and running costs can be greatly reduced. The entire amount of deposits on the strainer element can be returned and reused as raw materials or as a filter aid. It is economically superior and has extremely high utility value.

It is explanatory drawing which illustrates the strainer system which concerns on 1st Embodiment. It is a circuit diagram which illustrates the strainer system concerning a 1st embodiment. It is explanatory drawing which illustrates the strainer system which concerns on 2nd Embodiment. It is a circuit diagram which illustrates the strainer system concerning a 2nd embodiment. It is explanatory drawing which illustrates the strainer system which concerns on 3rd Embodiment. It is explanatory drawing which illustrates a strainer element. It is a figure which shows the water quality test inspection report of an Example.

S1, S2, S3: strainer system, 1: strainer, 2: strainer element, 3: raw water inlet, 4: treated water outlet, 5: backwash outlet, 6: air inlet, 7: container, 8: Pressure sensor, 9: pressure switch,
11: Solenoid valve, 12: Check valve, 13: Air inlet, 14: Suction / discharge port,
21: small protrusion, 22: coil, 23: fixture, 24: cored bar, 25: nut,
P: Pump, M: Motor, T: Water tank, G: Gap, B: Partition plate, C: Cover, R: Adsorbed material receiver

Claims (2)

A gap is formed between adjacent rings of the coil or ring-shaped piece constituting the cylindrical body wound in a coil shape or a cylindrical body in which a large number of ring-shaped pieces are overlapped, and a filter aid adheres to the gap portion and crosslinks. A strainer in which one or more strainer elements are stored in a container having an inlet, an outlet, and a partition plate that partitions between the inlet and the outlet, with one end of the strainer element fixed to the partition plate. A plurality of inlets projecting in a trumpet shape on a side surface below the partition plate of the container, and the trumpet-shaped projecting part communicates with the container through a check valve, and the outlet side pressure of the container A pressure sensor that measures the pressure, a pressure switch, and an electromagnetic valve that opens and closes in conjunction with the pressure switch. When the outlet side pressure reaches the set pressure, the pressure switch opens and closes the solenoid valve. Washing D Strainer system characterized in that it automatically performs the backwashing is blown over or backwash liquid. A gap is formed between adjacent rings of a coil or ring-shaped piece constituting a cylindrical body wound in a coil shape or a cylindrical body in which a large number of ring-shaped pieces are overlapped, and a filter aid adheres to the gap portion. 1 or a plurality of strainer elements, a partition plate that is fixed in a state where one end of the strainer element is suspended, a cover that covers the entire upper portion of the partition plate and includes a suction discharge port, and a lower portion of the strainer element In the strainer equipped with the adsorbent receiver disposed on the adsorbent, there is provided a means for removing the adsorbate comprising a pressure sensor provided on the discharge port side, a pressure switch, and a vibrator that vibrates the strainer element or a hammer that taps the strainer element. equipped to become, dropping the adsorbate to stop the suction in the outlet when the outlet-side pressure has reached the set pressure Strainer system, characterized in that the removed by.

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